HYBRID-EXTINCTION TYPE GAS CIRCUIT BREAKER WITH CHECK VALVE

摘要

The present invention efficiently cools a heat gas inputted to a thermal expansion chamber by increasing an amount of cold gases in the thermal expansion chamber by changing the opening and closing operations of a check valve in an existing hybrid-extinction type gas circuit breaker. For this, breaking performance is remarkably improved by efficiently cooling the heat gas in an extinction part in a heat breaking performance test which is a main breaking test of a circuit breaker.